Nope, it's never synced photos off the camera roll into iPhoto automatically. If iPhoto is set to open when a digital camera is attached, it would also auto launch when an iOS device was plugged in with photos in the camera roll. From there a user has to select what photos to import, or click the import all button. Once the photos are in iPhoto, then iTunes will resync them back to the phone, usually at a lower resolution to save space.